conjugate has 3 distinct synonyms spread across 4 of its 8 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
joined together especially in a pair or pairs
of an organic compound; containing two or more double bonds each separated from the other by a single bond
unite chemically so that the product is easily broken down into the original compounds
add inflections showing person, number, gender, tense, aspect, etc.
“conjugate the verb”
a mixture of two partially miscible liquids A and B produces two conjugate solutions: one of A in B and another of B in A
1 of the 8 recorded senses carries no synonym, antonym or related term, so it is not shown above. Every sense, with its definition and examples, is on the full entry for conjugate.
Synonyms, antonyms and the broader and narrower relations for conjugate come from Princeton University’s WordNet. Full sources and licences.